The results of the experiment.1. The fire 5V into the circuit. When the light comes in the LDR current flowing through the LDR is high, due to the low resistance, 2 leg of IC555. As per down the ground.2. When there is less light resistance of LDR is high, a flowing stream, less LDR1 will send signals to stimulate the legs 2 of IC1 work makes piezo size. 6V loudly.
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